Section 24.1.5.1 – Westermo RedFox Series User Manual
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Westermo OS Management Guide
Version 4.17.0-0
❼ Log files and remote logging: Alarms can be logged locally or passed to a
remote logging server. See
for general information on event and
alarm logging.
❼ Digital-Out: On units equipped with a Digital I/O contact, the Digital-Out
pins can be used as an alarm target. Similar to the ’ON’ LED, digital-out
provides a summary alarm function, where the ’gate’ is closed when the
switch is operating ’OK’, and open when any of the associated alarm triggers
becomes active (or when the unit has no power).
See
for general information on Digital I/O.
❼ ’ON’ LED: There are front panel LEDs which can indicate status of specific
ports or protocols. There is also a general status LED, which shows a green
light when the unit is operating ’OK’, but shows a red light as soon as any of
the associated alarm triggers becomes active. Thus, the ’ON’ LED provides
a summary alarm function.
See
for general information on front panel LEDs.
❼ Reboot: (USE WITH CARE) The reboot target is used to make the unit to
reboot upon a specified alarm event. The purpose is to provide a way to
reboot the unit on a regular basis (i.e., by mapping a timer trigger to an
action profile with target reboot, see
In addition, an operator can view the alarm status via the Web and CLI interfaces.
24.1.5.1
Summary alarm
The summary alarm in use by the digital-out and ON LED targets assumes that
every alarm trigger define the condition when the alarm is active (”alarm” situa-
tion) and inactive (”normal” situation).
❼ For many triggers this definition is implicit, e.g., a link alarm is active when
the port (or interface) is down and inactive it is up.
❼ Other triggers, such as temperature or digital-in sensor triggers allow for the
operator to define if the alarm is active: high or low temperature, voltage
signal present or not present, etc. See
, and in particular
and
, for further information on the active and inactive trigger
states.
Working as a summary alarm, digital-out as well as the ON LED will indicate
’alarm’ as soon as any of the associated alarm triggers become active. For the
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